Theorem bd0 13859

Description: A formula equivalent to a bounded one is bounded. See also bd0r 13860. (Contributed by BJ, 3-Oct-2019.)

Hypotheses

Ref	Expression
bd0.min	⊢ BOUNDED 𝜑
bd0.maj	⊢ (𝜑 ↔ 𝜓)

Assertion

Ref	Expression
bd0	⊢ BOUNDED 𝜓

Proof of Theorem bd0

Step	Hyp	Ref	Expression
1		bd0.min	. 2 ⊢ BOUNDED 𝜑
2		bd0.maj	. . 3 ⊢ (𝜑 ↔ 𝜓)
3	2	ax-bd0 13848	. 2 ⊢ (BOUNDED 𝜑 → BOUNDED 𝜓)
4	1, 3	ax-mp 5	1 ⊢ BOUNDED 𝜓

Syntax hints:   ↔ wb 104  BOUNDED wbd 13847

This theorem was proved from axioms:  ax-mp 5  ax-bd0 13848

This theorem is referenced by:  bd0r  13860  bdth  13866  bdnth  13869  bdnthALT  13870  bdph  13885  bdsbc  13893  bdsnss  13908  bdcint  13912  bdeqsuc  13916  bdcriota  13918  bj-axun2  13950